to antswer you your question about expertise skills in FOV:
yes it's not possible to train it to lvl 15 in FOV if your character is made in ED this is not a glitch
when you make a new character in FOV you can get lvl 15 on one of the expertise skills (dual wield single, unarmed and two handed) is this a glitch no because you always begin at level 35.
if you played ED first you can have a higher level like 36 or higher.
to ballance the game a little bit they desided that by a new character making in FOV you can get an expertise skill upgrade to level 15. it's fair and you'll need it. because at lvl 35 the beginning can be quite difficult all enemy's are a higher level then you (3 levels) so that is an unfair advantage they have, so that why you can get level 15 with an expertise skill.
added a little spoiler for you
you can get +1 increase in destruction, life leach, lockpick, charm and summon demon by mindreading certain people!
